Boiler and like furnace



May 8, 1923. 1,454,229 J. CROMPTON ET AL BOILER AND LIKE FURNACE Filed 1mg; 14, 1922 v s Sheets-Sheet 1 ll ll .J. .CROMPTON ET AL.

- May 8, 1923.

; BOILER AND LIKE FURNACE Filed Aug. 14, 1922 3 Sheets-Sheet 2 May 8, 1923..

4 1,454,229 J..CROMPTON ET AL BOILER AND LIKE FURNACE 7 Filed Aug. 14, s Sheets-Sheet 3 I Inn! Patented May 8, 1923.

UNITE JAMES GROMPTON AND WILLIAM GALLAGHER, OF SALFORD, MANCHESTER, ENGLAND.

ENT o -Pics} BOILER AND LIKE FURNACE.

Application'filed August 14, 1922. Serial No. 581,814.

the air is forced through openings regularly disposed over the entire area of the grate, the different channels communicating with different sets of openings whereby the supply of air to each set of openings is independent of all the other sets;

The main object of the present-invention is to provide a furnace, of the kind referred to, adapted for useveither with a forced draft or a natural draft, a. further object being to provide an improved construction and arrangement of grate for such furnaces.

According to the invention, the fire bars proper are of T-shape in cross section or of flat, plate-like or other formation adapted to be mounted on supporting bars or the like arranged with the broad side vertically disposed so that adjacent bars constitute two sides of the desired channels. Said supporting members may be arranged longitudinally of the furnace, and the fire bars proper disposed thereon transversely of the same. The undersides of the channels are provided with closure plates hingedly or otherwise mounted thereon so as to be capable of being moved into position to complete the channels or moved to allow of a natural draft over the entire grate area.

The invention will be more particularly described by the aid of. the accompanying drawings in which Fig. 1 is a longitudinal section of the furnace of a Lancashire boiler showing the invention applied.

Fig. 2 is a. sectional plan view of Fig. 1 with part of the fire bars removed.

Fig. 3 is a front view of the furnace shown in Fig. 1.

Fig. 4 a transverse sectional View.

Fig. 5 is a detail sectional view showing the flaps closed, drawn to an enlarged scale, and

againstthe bottom edge of said back F ig."6 is a pla n view Fig. 5.

cording to one convenient manner as, illusi In carrying the invention into effect *aci trated, a furnace at is provided withflfire-barsb transversely of thefurnace. The'fire-bars bare supported on longitudinally arranged bars a mounted on the cross stays cl, 6 at the front and back respectively, with ythe broad sides vertically disposed so'th'at adja i l cent bars constitute channels 7. The with projections two. sides of' the desired fire bars Z) are formed on one slde'and are vertical on the'other side so asto form regularly disposed openings Z2 air to the fire. i r a Hingedly mounted transversely of the furnacea and on the underside'of the'bars 0 are a number of comparativel narrowsla'ts g or closure members adapte complete the channels 7 with "adj acent bars,

unobstructed pit to the fire to the outside bars 0 a-sclearlyseen in Figs. 2and4.

Said slats or closure members are m'anipu-j lated by suitable .mechanism which may conveniently comprise a rod h extending from the back to the front of the furnace,

inclined planes i and 7' being provided at and front respectively to coact with the rod so that by moving the latter backwards or forward by means of a suit able manipulating handle h ing end, or other means, the closure memon the proj ect- I foritlle passageof v ,'when turned' H the barsc to i r but when turned downwards to allow'of the passage of air from the ashq bars I). The slats g-are hinged bers 9 may be raised to complete the channels or lowered to give access to the same for cleaning purposes or to-allow of a natural draft taking place. The bar it isprovided with anti-friction rollers and the edges of'each closure member 9 contacting with the bar it are preferably provided with an anti-friction roller 9 as shown. [Some or all of the channels 70 through which,by injectors or other means,

a current of air is forced into said channels.

The closure members g are preferably comparativelynarrow, say 3 inches wide,-s0 as passage of the natural or more channels and instead of being hingv f register with openings edly mounted may be slidably mounted. The

usual steam injectors or other means are provided for creating the forced draft.

that we claim is: 1. Furnaces for boilers, and the like, comprising flat bars set on edge and arranged longitudinally of the furnace at a distance apart such as to produce a series of longitudinal channels, fire-bars transversely arranged across and upon the said channel bars, closure members hinged below the channels and transversely arranged relatively thereto, and a single sliding bar and complemental inclined. planes'whereby all the closure members can be simultaneously operated, substantially as described.

2. Furnaces for boilers, and the like, comprising iiat bars set on edge and arranged longitudinally of the furnace at a distance apart such as to produce a series of longitudinal cl'iannels, tire-bars transversely arranged across and upon the said channel bars,

closure members hinged below the channels and transvers ly arrangcc relatively thereto, an anti-friction roller on the edge of each closure member to engage a sliding bar, a sliding bar having anti-friction rollers to engage inclined planes and in clined planes arranged to receive the sliding bar, whereby all the closure members are simultaneously opened or closed, substantially as described.

3. Furnaces for boilers, and the like, comprising flat bars set on edge and arranged longitudinally of the furnace at a distance apart such as to produce a series of longitudinal channels, means to force air into the channels, lire-bars transversely arranged across and upon the said channel bars, closure members hinged below the channels and transversely arranged relatively thereto, and a single sliding bar and complemental inclined planes whereby all the closure members can be simultaneously operated, substantially as described.

l. Furnaces for boilers, and the like, comprising tlat bars set on edge and arranged longitudinally of the furnace at a distance apart such as to produce aseries of longitudinal channels, means to force air into the channels, fire-bars transversely arranged across and upon the said channel bars, clo sure meu'ibers hinged below the channels and tmnsversely arranged relatively thereto, an anti-friction roller on the edge of each closure member to engage a sliding bar, a sliding bar having anti-friction rollers to engage inclined planes and inclined planes arranged to receive the sliding bar, whereby all the closure members are simultaneously opened or closed, substantially as described.

In testimony whereof we have signed our names to this specification.

JAMES CRQMPTON. WILLIAM GALLAGHER. 

